Odinetz Collart Olga. (1988). Aspectos ecologicos do camarao Macrobrachium amazonicum (Heller, 1862) no baixo Tocantins (Pa-Brazil). Memoria de la Sociedad de Ciencias Naturales La Salle, 158 (suppl. 1988), p. 341-353. ISSN 0037-8518.
Titre du document
Aspectos ecologicos do camarao Macrobrachium amazonicum (Heller, 1862) no baixo Tocantins (Pa-Brazil)
Année de publication
1988
Type de document
Article
Auteurs
Odinetz Collart Olga
Source
Memoria de la Sociedad de Ciencias Naturales La Salle, 1988,
158 (suppl. 1988), p. 341-353 ISSN 0037-8518
The ecology of the freshwater prawn Macrobrachium amazonicum has been studied in the Lower Tocantins river in 1985-86 from Cameta to the Tucurui hydroelectric dam and in the reservoir. The population of the river below the dam exhibited a mean total length of 60 mm and a maximum of 132 mm. The mean lengths displayed a seasonal oscillation correlated with adults migration and reproduction from March to July and recruitment from September to February. The global female prawns were parasited by the isopod Probopyrus in the lower part of the river. The population of M. amazonicum that colonized the reservoir showed different biological characteristics from that below the dam : smaller mean and maximum lengths, earlier sexual maturity, strongly female-biaised sex-ratio, reproduction in September and recruitment from January to March. No P. bithynis isopod was collected in this area. (Résumé d'auteur)
Plan de classement
Autoécologie [036EAUCON03]
;
Stocks [040PECHE03]
Descripteurs
CREVETTE ; STRUCTURE DU PEUPLEMENT ; ALLOMETRIE ; DYNAMIQUE DE POPULATION ; MIGRATION ; REPRODUCTION ; VARIATION SAISONNIERE ; PARASITISME ; RELATION ESPECE ENVIRONNEMENT
